US20190070718A1 - Pneumatic stapler - Google Patents

Pneumatic stapler Download PDF

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Publication number
US20190070718A1
US20190070718A1 US16/044,471 US201816044471A US2019070718A1 US 20190070718 A1 US20190070718 A1 US 20190070718A1 US 201816044471 A US201816044471 A US 201816044471A US 2019070718 A1 US2019070718 A1 US 2019070718A1
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United States
Prior art keywords
staple
wire
bending
driving
control chamber
Prior art date
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Abandoned
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US16/044,471
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English (en)
Inventor
Hsien Cheng CHEN
Yao Hong Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Patek Pneumatics Co Ltd
Original Assignee
Patek Pneumatics Co Ltd
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Publication date
Application filed by Patek Pneumatics Co Ltd filed Critical Patek Pneumatics Co Ltd
Assigned to PATEK PNEUMATICS CO., LTD. reassignment PATEK PNEUMATICS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHEN, HSIEN CHENG, WANG, YAO HONG
Publication of US20190070718A1 publication Critical patent/US20190070718A1/en
Abandoned legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C5/00—Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor
    • B25C5/10—Driving means
    • B25C5/13—Driving means operated by fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C5/00—Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor
    • B25C5/02—Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor with provision for bending the ends of the staples on to the work
    • B25C5/0285—Hand-held stapling tools, e.g. manually operated, i.e. not resting on a working surface during operation

Definitions

  • the present invention relates to a pneumatic stapler capable of bending straight staple-forming wires into U-shaped staplers while performing a staple-driving operation; and more particularly, to a pneumatic stapler that requires only one pressure source to perform both a staple-driving operation and a wire-bending operation.
  • an interior decorator In general woodworking, an interior decorator often uses nails to fixedly connect two or more pieces of wood workpieces to one another. However, there are usually many points between the wood workpieces that require fixed connection, and the interior decorator has to consume a lot of time and effort to manually drive the nails into the workpieces with a hammer at the risk of carelessly injuring his fingers by the hammer.
  • a pneumatic stapler designed for woodworking has been introduced into the market.
  • the conventional pneumatic stapler there is a magazine loaded with a plurality of staples. When the pneumatic stapler is connected to a pressure source, gas supplied from the pressure source drives one of the staples into the workpieces each time, so that a user can handle the woodworking in a safe, labor-saving and highly efficient manner.
  • the currently available pneumatic stapler can only use the gas from the pressure source to drive the staples into the workpieces.
  • the staples are U-shaped and can be more easily pushed into the workpieces.
  • the magazine for loading them must be configured corresponding to the staples. In the case of a relatively short magazine, only a small number of staples can be loaded therein.
  • a relatively long magazine might cause inconvenience in handling the woodworking.
  • the staples in the magazine of the conventional pneumatic stapler is about to be used up, the remaining staples tend to easily get stuck in a staple outlet of the magazine in the process of being driven into the workpieces.
  • the number of staples that can be loaded at a time is restricted by the length of the magazine.
  • the user has to take time to change or replenish the magazine frequently, and is subjected to the problem of stuck staples when the staples in the magazine is running out.
  • the user has to stop using the pneumatic stapler for a while and gets it fixed. In some worse condition, money and time might be required to repair the pneumatic stapler.
  • a primary object of the present invention is to provide a pneumatic stapler that requires only one pressure source to move a staple-driving element and a wire-bending element to a staple-driving position and a wire-bending position, respectively, for performing a staple-driving operation and a wire-bending operation sequentially or synchronously, and can have an increased number of straight staple-forming wire strips loaded therein at a time to provide high convenience in use.
  • Another object of the present invention is to provide the above pneumatic stapler that has a main body internally including a larger staple-driving control chamber and a smaller wire-bending control chamber, so that a larger part of the gas supplied from the only pressure source will flow into the staple-driving control chamber to produce a larger force to move the staple-driving element while a smaller part of the supplied gas will flow into the wire-bending control chamber to produce a smaller force to move the wire-bending element.
  • the wire-bending element won't be too quickly moved and thereby indirectly reduces the probability of forming damaged staples due to improper collision of the staple-forming wires with a bending block.
  • a further object of the present invention is to provide the above pneumatic stapler that includes a conveying assembly.
  • the conveying assembly is actuated at the same to move one staple-forming wire forward each time to a position below the staple-driving element for performing a next staple-driving operation.
  • the pneumatic stapler is capable of receiving an amount of gas supplied from a pressure source and includes a main body, a staple-driving mechanism and a wire-bending mechanism.
  • the main body internally includes a staple-driving control chamber and a wire-bending control chamber, and has a plurality of straight staple-forming wires loaded therein.
  • the wire-bending control chamber includes a first wire-bending gas flowing space located around an outer side of the staple-driving control chamber and a second wire-bending gas flowing space dimensionally smaller than the staple-driving control chamber.
  • the first wire-bending gas flowing space is communicable with the staple-driving control chamber
  • the second wire-bending gas flowing space is communicable with the first wire-bending gas flowing space via a third wire-bending gas flowing space.
  • At least one first through hole and at least one second through hole diametrically smaller than the first through hole are provided between the first wire-bending gas flowing space and the staple-driving control chamber; and the first through hole is axially located at a distance below the second through hole, such that a spacing distance is formed between the first and the second through hole.
  • the staple-driving mechanism includes a staple-driving element carrier axially movable in the staple-driving control chamber and divides the latter into a first and a second staple-driving gas flowing space.
  • the first staple-driving gas flowing space is initially not communicable with the wire-bending control chamber and accordingly in an isolated state for receiving the supplied gas.
  • the staple-driving element carrier is able to move a staple-driving element to a staple-driving position, at where the staple-driving element pushes one of the staple-forming wires, which has already been bent into a staple, out of the main body into a workpiece. Further, the spacing distance is larger than a thickness of the staple-driving element carrier.
  • the wire-bending mechanism includes a movable member axially movable in the wire-bending control chamber, a wire-bending element, and a return spring disposed in the wire-bending control chamber.
  • the staple-driving element carrier is movable by the supplied gas in the staple-driving control chamber to change a size of the first staple-driving gas flowing space relative to the second staple-driving gas flowing space, such that the first staple-driving gas flowing space is no longer in the isolated state but can communicate with the wire-bending control chamber, allowing the supplied gas received in the first staple-driving gas flowing space to flow into the wire-bending control chamber and move the movable member.
  • the movable member moved by the supplied gas further brings the wire-bending element to a wire-bending position for bending one of the staple-forming wires into a staple.
  • the return spring normally pushes the movable member upward, so that the movable member brings the wire-bending element to a ready-for-bending position, which is located away from the wire-bending position, and the wire-bending element in the ready-for-bending position is located away from the staple-forming wires.
  • the movable member is located in the second wire-bending gas flowing space.
  • the wire-bending mechanism includes a return passage instead of the return spring.
  • the return passage communicates with the wire-bending control chamber for guiding the supplied gas into the wire-bending control chamber.
  • the supplied gas flowed into the wire-bending control chamber upward pushes against the movable member, so that the movable member brings the wire-bending element to a position away from the wire-bending position.
  • the second staple-driving gas flowing space is always communicable with the wire-bending control chamber, so that both of the first and the second staple-driving gas flowing space are communicable with the wire-bending control chamber in the process the wire-bending element is moving to the wire-bending position. Further, with the second through hole being provided on the staple-driving control chamber within a middle section thereof, the wire-bending element is also moved to the wire-bending position when the staple-driving element is moved to the staple-driving position.
  • the second through hole can be provided on the staple-driving control chamber within a lower part or an upper part thereof, such that the staple-driving element and the wire-bending element are sequentially moved to the staple-driving position and the wire-bending position, respectively.
  • the wire-bending mechanism also includes a transmission assembly connected to between the movable member and the wire-bending element, and the wire-bending element is moved away from the wire-bending position by the movable member via the transmission assembly.
  • the transmission assembly also causes a conveying mechanism installed in the main body and pivotally connected to the transmission assembly to move the staple-forming wires forward, so that the first one of the staple-forming wires is located to one side of the staple-driving element.
  • the transmission assembly includes a first transmission element axially connected to the movable member and a second transmission element horizontally connected to the first transmission element, such that the first transmission element is located parallelly to the staple-driving element while the second transmission element is located perpendicularly to the staple-driving element.
  • the second transmission element is connected at an end opposite to the first transmission element to the wire-bending element, so that the wire-bending element is located close to the staple-driving element with a distance between the staple-driving element and the wire-bending element being equal to at least a total width of two parallelly arranged staple-forming wires.
  • the conveying mechanism includes a conveying assembly in contact with the staple-forming wires and a swing arm connected to between the conveying assembly and the transmission assembly. The swing arm brings the conveying assembly to move forward only one staple-forming wire each time and in only one direction.
  • a part of the swing arm forms a pivot end connected to the conveying assembly while the other part of the swing arm forms a movement rail.
  • the transmission assembly includes an outward extended boss for extending into the movement rail, such that the swing arm swings about the pivot end when the boss moves reciprocatingly in along the movement rail.
  • the conveying assembly includes a transmission belt in contact with the staple-forming wires and two spaced pulleys assembled to the transmission belt. One of the two pulleys is connected to the swing arm via a limiting unit, such that the two pulleys are limited by the limiting unit to rotate in only one direction.
  • the present invention is characterized in that the gas supplied from the pressure source into the main body first downward pushes the staple-driving element carrier, so that the staple-driving element is moved to the staple-driving position and the first and the second staple-driving gas flowing space all become communicable with the wire-bending control chamber, allowing the supplied gas to flow into the second wire-bending gas flowing space of the wire-bending control chamber to move the wire-bending element to the wire-bending position.
  • the pneumatic stapler of the present invention requires only one pressure source to move both of the staple-driving element and the wire-bending element, so that the pneumatic stapler can perform two functions, namely, staple-driving and wire-bending, and more pieces of straight staple-forming wire strips can be loaded in the pneumatic stapler at a time to provide higher convenience in use.
  • the second wire-bending gas flowing space of the wire-bending control chamber is dimensionally smaller than the staple-driving control chamber, most part of the supplied gas flows into the staple-driving control chamber to more quickly move the staple-driving element carrier while only a small part of the supplied gas flows into the second wire-bending gas flowing space to move the movable member at a slower speed.
  • the pneumatic stapler of the present invention produces a relatively large staple-driving force but a relatively small wire-bending force. With these arrangements, the wire-bending element won't be too quickly moved and thereby indirectly reduces the probability of forming damaged staples due to improper collision of the staple-forming wires with a bending block.
  • the transmission assembly connected to the movable member also actuates the conveying assembly to move the uppermost staple-forming wire strip forward, so that the first one of the staple-forming wires is located to one side of the staple-driving element, allowing the staple-driving element to perform a next staple-driving operation at any time.
  • FIG. 1 is a perspective view of a pneumatic stapler according to a first preferred embodiment of the present invention
  • FIG. 2 is a sectional view taken along line A-A of FIG. 1 ;
  • FIG. 3 is a fragmentary, sectional view of a cap included in the pneumatic stapler according to the first preferred embodiment of the present invention
  • FIG. 4 is an enlarged sectional view of a one-way bearing included in the pneumatic stapler according to the first preferred embodiment of the present invention
  • FIG. 5 is a cutaway view of a staple-forming wire storage mechanism included in the pneumatic stapler according to the first preferred embodiment of the present invention
  • FIG. 6 is an exploded cutaway view of a staple-driving mechanism included in the pneumatic stapler according to the first preferred embodiment of the present invention
  • FIG. 7A shows a staple-driving element of the staple-driving mechanism is located at a ready-for-driving position
  • FIG. 7B shows the staple-driving element is located at a staple-driving position
  • FIG. 8 is an exploded perspective view of a wire-bending mechanism included in the pneumatic stapler according to the first preferred embodiment of the present invention.
  • FIG. 9A shows a wire-bending element of the wire-bending mechanism is located at a ready-for-bending position
  • FIG. 9B shows the wire-bending element is located at a wire-bending position
  • FIG. 10A shows gas is supplied from a pressure source into a main body of the pneumatic stapler according to the first preferred embodiment of the present invention
  • FIG. 10B shows the supplied gas flows from a first staple-driving gas flowing space into a first wire-bending gas flowing space in the pneumatic stapler according to the first preferred embodiment of the present invention
  • FIG. 10C shows the completion of one staple-driving operation and one wire-bending operation by the pneumatic stapler according to the first preferred embodiment of the present invention
  • FIG. 10D shows a bearing shaft of the one-way bearing of FIG. 4 rotates relative to a bearing case
  • FIG. 10E shows a conveying mechanism included in the pneumatic stapler according to the first preferred embodiment of the present invention moves a staple-forming wire strip toward the wire-bending mechanism;
  • FIG. 10F shows the bearing case and the bearing shaft of the one-way bearing rotate synchronously
  • FIG. 11 shows a pneumatic stapler according to a second preferred embodiment of the present invention.
  • FIG. 12A shows gas supplied to the pneumatic stapler according to the second preferred embodiment of the present invention flows into an intake chamber, an intake passage and a return passage thereof at the same time;
  • FIG. 12B shows the completion of one staple-driving operation and one wire-bending operation by the pneumatic stapler according to the second preferred embodiment of the present invention.
  • FIG. 12C shows the wire-bending element is moved away from the wire-bending position in the pneumatic stapler according to the second preferred embodiment of the present invention.
  • a pneumatic stapler 1 mainly includes a main body 10 , a staple-forming wire storage mechanism 20 , a staple-driving mechanism 30 , and a wire-bending mechanism 40 .
  • the main body 10 includes a staple-driving portion 11 located at a front side of the main body 10 , a handle portion 12 sidewardly extended from an end of the staple-driving portion 11 and located at a rear side of the main body 10 , and an assemblage portion 13 sidewardly extended from another end of the staple-driving portion 11 opposite to the handle portion 12 and also located at the rear side of the main body 10 .
  • the staple-driving portion 11 internally defines a wire-bending control chamber 14 and has a driving guide block 15 connected to a bottom thereof.
  • the driving guide block 15 internally defines an axially extended driving rail 151 and includes a sidewardly protruded bending block 152 .
  • An end of the driving rail 151 farther away from the wire-bending control chamber 14 forms a staple outlet 151 a located at a lower side of the main body 10 .
  • a portion of the driving rail 151 located above the bending block 152 is sidewardly extended toward the rear side of the main body 10 to form a receiving space 151 b.
  • the wire-bending control chamber 14 is internally provided with a cylindrical staple-driving control wall 16 and a staple-driving control chamber 17 defined in the cylindrical staple-driving control wall 16 , such that the first wire-bending gas flowing space 141 in the wire-bending chamber 14 is located around an outer side of the staple-driving control chamber 17 .
  • the cylindrical staple-driving control wall 16 is provided around an end closer to the driving guide block 15 with a plurality of first through holes 161 , and further provided around a location above the first through holes 161 with a plurality of second through holes 162 , which respectively have a hole size smaller than that of the first through holes 161 , such that the staple-driving control chamber 17 is communicable with the first wire-bending gas flowing space 141 via the first through holes 161 and the second through holes 162 .
  • the second through holes 162 are located within a middle section of the cylindrical staple-driving control wall 16 and the first through holes 161 are located at a height lower than that of the second through holes 162 , such that an spacing distance 163 (see FIG. 6 ) is formed between the locations of the first and of the second through holes 161 , 162 on the cylindrical staple-driving control wall 16 .
  • the second wire-bending gas flowing space 142 is dimensionally smaller than the staple-driving control chamber 17 , and is communicable with the first wire-bending gas flowing space 141 via a third wire-bending gas flowing space 143 , which is dimensionally smaller than the second wire-bending gas flowing space 142 .
  • the handle portion 12 of the main body 10 is provided with a trigger 121 , and internally defines an intake chamber 122 communicable with the staple-driving control chamber 17 and an intake passage 123 communicable with the intake chamber 122 .
  • the intake passage 123 is connected at an end opposite to the intake chamber 122 to a cap 18 , which is assembled to the staple-driving portion 11 .
  • the cap 18 includes a fixing member 181 , which is fixed to the staple-driving portion 11 , and a shielding member 182 , which is located between the fixing member 181 and the cylindrical staple-driving control wall 16 .
  • the fixing member 181 has a central portion that is extended to form a downward projected hollow fixing column 181 a and a connecting passage 181 b communicable with the intake passage 123 .
  • the fixing column 181 a is internally provided with a pressing member 183 , and is provided with a plurality of openings 181 c for communicating with an environment outside the pneumatic stapler 1 .
  • the shielding member 182 is reciprocally movable between the fixing member 181 and the cylindrical staple-driving control wall 16 and has a hollow shielding column 182 a extended toward the fixing column 181 a , such that the shielding column 182 a is selectively in contact with the pressing member 183 .
  • An elastic member 184 is disposed in the shielding column 182 a with two opposite ends of the elastic member 184 pressed against the shielding member 182 and the pressing member 183 .
  • the elastic member 184 normally pushes the shielding member 182 against an upper end of the cylindrical staple-driving control wall 16 , so that the shielding column 182 a is not in contact with the pressing member 183 and does not shield the openings 181 c on the fixing column 181 a.
  • the assemblage portion 13 of the main body 10 has a conveying mechanism 50 assembled therein.
  • the conveying mechanism 50 includes a conveying assembly 51 and a swing arm 52 .
  • the conveying assembly 51 includes a first pulley 511 and a second pulley 512 , which are spaced from each other but indirectly connected to each other via a transmission belt 513 , such that the second pulley 512 is brought by the transmission belt 513 to rotate clockwise when the first pulley 511 rotates clockwise.
  • a limiting unit 53 is assembled to one side of the first pulley 511 for limiting the first pulley 511 and the second pulley 512 to one-way rotation, i.e., to rotate in only one direction.
  • a part of the swing arm 52 forms a pivot end 521 (see FIG. 5 ), to which the limiting unit 53 is connected, and the other part of the swing arm 52 forms a movement rail 522 (see FIG. 5 ).
  • the limiting unit 53 is a one-way bearing 531 having a bearing case 531 a and a bearing shaft 531 b .
  • the bearing case 531 a is connected to the first pulley 511 and internally defines an assembling space 531 c and a plurality of movement-allowance spaces 531 d communicable with the assembling space 531 c .
  • the bearing shaft 531 b is axially extended through the assembling space 531 c .
  • Each of the movement-allowance spaces 531 d has a roller 531 e and a push spring 531 f received therein with the push spring 531 f normally pushing against the roller 531 e .
  • the bearing shaft 531 b is connected to the pivot end 521 of the swing arm 52 . It is understood the above description of the limiting unit 53 as a one-way bearing 531 is only illustrative. In other operable embodiments, the limiting unit 53 can be otherwise a ratchet, for example.
  • the staple-forming wire storage mechanism 20 includes a staple-forming wire magazine 21 located in the assemblage portion 13 .
  • a plurality of sequentially superposed staple-forming wire strips 22 is received in the staple-forming wire magazine 21 and located below the conveying assembly 51 .
  • Each of the staple-forming wire strips 22 includes a plurality of continuously and parallelly arranged straight staple-forming wires 221 .
  • a plurality of spaced elastic coils 23 is disposed between the lowest one of the superposed staple-forming wire strips 22 and the staple-forming wire magazine 21 to elastically upwardly push the plurality of staple-forming wire strips 22 toward the conveying mechanism 50 , so that the uppermost one of the superposed staple-forming wire strips 22 is always in contact with the transmission belt 513 of the conveying assembly 51 .
  • the staple-driving mechanism 30 includes a staple-driving element carrier 31 , a staple-driving element 32 , and a buffering member 33 .
  • the staple-driving element carrier 31 has a thickness smaller than the spacing distance 163 and is located in the staple-driving control chamber 17 to divide the latter into a first staple-driving gas flowing space 171 , which is closer to the cap 18 , and a second staple-driving gas flowing space 172 , which is closer to the driving guide block 15 .
  • the first and the second staple-driving gas flowing space 171 , 172 can be communicable or not communicable with each other.
  • the staple-driving element 32 has an upper end forming a connecting end 321 assembled to the staple-driving element carrier 31 , and a lower end forming a pushing end 322 extended through the staple-driving control chamber 17 into the driving rail 151 behind the staple outlet 151 a .
  • the buffering member 33 is located in the staple-driving control chamber 17 and is made of a resilient material according to the first preferred embodiment of the present invention.
  • the staple-driving element carrier 31 of the staple-driving mechanism 30 is movable in the staple-driving control chamber 17 of the main body 10 , so that the moving staple-driving element carrier 31 changes the size of the first staple-driving gas flowing space 171 relative to the second staple-driving gas flowing space 172 in the staple-driving control chamber 17 .
  • the moving staple-driving element carrier 31 brings the staple-driving element 32 from a ready-for-driving position P 1 , which is farther away from the staple outlet 151 a , to a staple-driving position P 2 , in which the pushing end 322 of the staple-driving element 32 is extended beyond the staple outlet 151 a.
  • the staple-driving element 32 of the staple-driving mechanism 30 is located at the ready-for-driving position P 1 , the staple-driving element carrier 31 is located at a height higher than the second through holes 162 , and the first staple-driving gas flowing space 171 is smaller than the second staple-driving gas flowing space 172 . Therefore, the first staple-driving gas flowing space 171 in the staple-driving control chamber 17 is not communicable with the first wire-bending gas flowing space 141 in the wire-bending control chamber 14 via the second through holes 162 . However, the second staple-driving gas flowing space 172 is communicable with the first wire-bending gas flow space 141 via the first and the second through holes 161 , 162 .
  • the staple-driving element 32 of the staple-driving mechanism 30 is located at the staple-driving position P 2 , the staple-driving element carrier 31 is located at a height lower than the second through holes 162 , and the first staple-driving gas flowing space 171 is larger than or equal to the second staple-driving gas flowing space 172 . Therefore, the first staple-driving gas flowing space 171 is communicable with the first wire-bending gas flowing space 141 in the wire-bending control chamber 14 via the second through holes 162 .
  • the second staple-driving gas flowing space 172 is communicable with the first wire-bending gas flow space 141 only via the first through holes 161 .
  • the staple-driving element carrier 31 is in contact with the buffering member 33 .
  • the wire-bending mechanism 40 includes a movable member 41 , a return spring 42 , a transmission assembly 43 , and a wire-bending element 44 .
  • the movable member 41 and the return spring 42 are in contact with each other and located in the second wire-bending gas flowing space 142 of the wire-bending control chamber 14 .
  • the movable member 41 is connected to the wire-bending element 44 via the transmission assembly 43 .
  • the transmission assembly 43 includes an upright first transmission element 431 located parallel to the staple-driving element 32 , and a horizontally extended second transmission element 432 selectively contactable with the staple-driving element 32 .
  • the first and the second transmission element 431 , 432 are assembled together, such that they are located substantially perpendicular to each other.
  • the first transmission element 431 is axially extended through the return spring 42 to connect at an end farther away from the second transmission element 432 to the movable member 41 .
  • the horizontal second transmission element 432 is provided at an end closer to the upright first transmission element 431 with an outward extended boss 433 for extending into the movement rail 522 on the swing arm 52 .
  • the other end of the second transmission element 432 farther away from the first transmission element 431 is assembled to the wire-bending element 44 , so that the wire-bending element 44 is located in the receiving space 151 b , which is formed on the driving guide block 15 and communicable with the driving rail 151 , and is located just above the bending block 152 .
  • the wire-bending element 44 can be moved by the transmission assembly 43 toward the staple-driving element 32 with a distance between the staple-driving element 32 and the wire-bending element 44 being equal to a total width of two parallelly arranged staple-forming wires 221 .
  • the distance between the staple-driving element 32 and the wire-bending element 44 is only illustrative. In other operable embodiments of the present invention, the distance between the staple-driving element 32 and the wire-bending element 44 can be equal to a total width of three, four or five parallelly arranged staple-forming wires 221 .
  • the return spring 42 normally pushes against the movable member 41 , so that the movable member 41 is located at the highest position in the second wire-bending gas flowing space 142 . Meanwhile, the wire-bending element 44 is located at a ready-for-bending position P 3 with a distance away from the bending block 152 .
  • the movable member 41 is movable in the second wire-bending gas flowing space 142 of the wire-bending control chamber 14 . When the movable member 41 is moved downward, it compresses the return spring 42 , so that a relative distance between two opposite ends of the return spring 42 is shortened.
  • the wire-bending element 44 When the movable member 41 is moving, the wire-bending element 44 is moved by the movable member 41 via the transmission assembly 43 from the ready-for-bending position P 3 downward to a wire-bending position P 4 close to the bending block 152 . While the wire-bending element 44 is moving from the ready-for-bending position P 3 to the wire-bending position P 4 , the boss 433 on the second transmission element 432 is also moving in along the movement rail 522 , bringing the swing arm 52 to swing about the pivot end 521 .
  • the handle portion 12 of the main body 10 is connected to a pressure source (not shown), which supplies an amount of gas into the intake chamber 122 and the intake passage 123 in the handle portion 12 .
  • a pressure source not shown
  • the trigger 121 of the handle portion 12 is pulled, the supplied gas can flow only into the intake chamber 122 but not the intake passage 123 .
  • the supplied gas flows into the intake chamber 122 , it pushes the shielding member 182 of the cap 18 toward the fixing member 181 , so that a gap is formed between the shielding member 182 and the cylindrical staple-driving control wall 16 , allowing the supplied gas to flow from the intake chamber 122 into the first staple-driving gas flowing space 171 in the staple-driving control chamber 17 .
  • the supplied gas flows into the first staple-driving gas flowing space 171 , it downward pushes against the staple-driving element carrier 31 , so that the latter is ready for moving the staple-driving element 32 from the ready-for-driving position P 1 toward the staple-driving position P 2 .
  • the staple-driving element carrier 31 is located at a position higher than the second through holes 162 , and the first staple-driving gas flowing space 171 is isolated from and not communicable with the wire-bending control chamber 14 , and not any of the supplied gas can flow into the wire-bending control chamber 14 . Therefore, the movable member 41 of the wire-bending mechanism 40 does not move in the second wire-bending gas flowing space 142 of the wire-bending control chamber 14 and the wire-bending element 44 of the wire-bending mechanism 40 is located at the ready-for-bending position P 3 .
  • the shielding column 182 a of the shielding member 182 is finally in contact with the pressing member 183 to thereby shield the openings 181 c , and the supplied gas can flow only into the staple-driving control chamber 17 .
  • the staple-driving element carrier 31 of the staple-driving mechanism 30 pushed by the supplied gas moves downward in the staple-driving control chamber 17 .
  • the staple-driving element carrier 31 is moved to a position between the first through holes 161 and the second through holes 162 , it is located lower than the second through holes 162 , and the first staple-driving gas flowing space 171 is no longer isolated from the wire-bending control chamber 14 but is communicable with the latter via the second through holes 162 .
  • the first staple-driving gas flowing space 171 and the second staple-driving gas flowing space 172 are communicable with the first wire-bending gas flowing space 141 of the wire-bending control chamber 14 via the second through holes 162 and the first through holes 161 , respectively.
  • a part of the supplied gas forms staple-driving gas that pushes against the staple-driving element carrier 31
  • another part of the supplied gas forms wire-bending gas that pushes against the movable member 41 .
  • the wire-bending gas flows from the first staple-driving gas flowing space 171 through the second through holes 162 into the first wire-bending gas flowing space 141 , and then further flows through the third wire-bending gas flowing space 143 into the second wire-bending gas flowing space 142 to push against the movable member 41 . Therefore, the movable member 41 is ready for moving the wire-bending element 44 via the transmission assembly 43 from the ready-for-bending position P 3 to the wire-bending position P 4 . Since the second wire-bending gas flowing space 142 is dimensionally smaller than the staple-driving control chamber 17 , the wire-bending gas has a volume smaller than that of the staple-driving gas. In other words, compared to the staple-driving gas, less gas volume is required to move the movable member 41 of the wire-bending mechanism 40 .
  • the staple-driving gas having a volume larger than the wire-bending gas also produces a relatively large force to push against the staple-driving element carrier 31 , so that the staple-driving element carrier 31 carries the staple-driving element 32 to quickly move in along the driving rail 151 in the driving guide block 15 to the staple-driving position P 2 .
  • the pushing end 322 of the staple-driving element 32 is pressed against a staple formed of one of the staple-forming wires 221 and moves the staple toward the staple outlet 151 a , from where the staple leaves the main body 10 and is driven into a workpiece (not shown). Meanwhile, the staple-driving element carrier 31 is in contact with and buffered by the buffering member 33 to slow down.
  • the movable member 41 of the wire-bending mechanism 40 will be still moving in the second wire-bending gas flowing space 142 when the staple-driving element 32 is located at the staple-driving position P 2 .
  • the wire-bending element 44 is not located at the wire-bending position P 4 when the staple-driving element 32 has been located at the staple-driving position P 2 .
  • the wire-bending gas which has a volume smaller than the staple-driving gas, enables the wire-bending element 44 and the bending block 152 to together bend, with a relatively small force, the most front staple-forming wire 221 in the uppermost staple-forming wire strip 22 to form a staple.
  • the transmission assembly 43 also brings the swing arm 52 to swing about the pivot end 521 thereof, causing the boss 433 in the movement rail 522 to move from an end of the movement rail 522 farther away from the pivot end 521 to the other end closer to the pivot end 521 .
  • the first pulley 511 would not rotate when the swing arm 52 rotates counterclockwise.
  • the second through holes 162 can be provided within a lower or an upper part of the cylindrical staple-driving control wall 16 , so that the second through holes 162 are located closer to the driving guide block 15 or the cap 18 , respectively.
  • the wire-bending element 44 it is possible for the wire-bending element 44 to reach the wire-bending position P 4 when the staple-driving element 32 has not yet arrived at the staple-driving position P 2 , or for the wire-bending element 44 and the staple-driving element 32 to reach the wire-bending position P 4 and the staple-driving position P 2 , respectively, at the same time.
  • FIGS. 2, 3 and 10E Please refer to FIGS. 2, 3 and 10E .
  • the trigger 121 of the handle portion 12 When the trigger 121 of the handle portion 12 is released, the supplied gas flows into both of the intake chamber 122 and the intake passage 123 .
  • the shielding member 182 closes the upper end of the cylindrical staple-driving control wall 16 and stops the supplied gas from flowing into the staple-driving control chamber 17 .
  • the openings 181 c are not shielded by the shielding column 182 a . Therefore, the staple-driving gas in the staple-driving control chamber 17 and the wire-bending gas in the wire-bending control chamber 14 can only flow through the openings 181 c on the fixing member 181 into the environment outside the main body 10 .
  • the wire-bending gas flows through the first through holes 161 into the second staple-driving gas flowing space 172 of the staple-driving control chamber 17 to move the staple-driving element carrier 31 of the staple-driving mechanism 30 from a bottom to a top of the staple-driving control chamber 17 .
  • the staple-driving element 32 at the staple-driving position P 2 is carried by the staple-driving element carrier 31 back to the ready-for-driving position P 1 .
  • the return spring 42 upward pushes against the movable member 41 of the wire-bending mechanism 40 , so that the movable member 41 is moved to a top of the second wire-bending gas flowing space 142 of the wire-bending control chamber 14 and brings the wire-bending element 44 via the transmission assembly 43 to move from the wire-bending position P 4 back to the ready-for-bending position P 3 .
  • the transmission assembly 43 also brings the swing arm 52 to swing clockwise about the pivot end 521 , the boss 433 is also moving in along the movement rail 522 away from the pivot end 521 of the swing arm 52 .
  • the first pulley 511 can rotate when the swing arm 52 swings clockwise. Via the transmission belt 513 , the rotating first pulley 511 brings the second pulley 512 to rotate at the same time.
  • the moving transmission belt 513 brings the uppermost one of the superposed staple-forming wire strips 22 to move toward the driving guide block 15 , such that the already bent staple-forming wire is located between the staple-driving element 32 and the staple outlet 151 a , and a following staple-forming wire 221 is located between the wire-bending element 44 and the bending block 152 .
  • the staple-driving element 32 and the wire-bending element 44 are moved to the staple-driving position P 2 and the wire-bending position P 4 , respectively, to complete the staple-driving and the wire-bending operation.
  • FIG. 11 shows a pneumatic stapler according to a second preferred embodiment of the present invention.
  • the second preferred embodiment has a main body 10 , a staple-forming wire storage mechanism 20 , a staple-driving mechanism 30 and a conveying mechanism 50 structurally similar to those in the first preferred embodiment but a different wire-bending mechanism 40 . Therefore, only the wire-bending mechanism 40 will be described hereinafter.
  • the wire-bending mechanism 40 does not include any return spring 42 but has a return passage 45 formed in the staple-driving portion 11 of the main body 10 for guiding the wire-bending gas.
  • the wire-bending mechanism 40 in the second preferred embodiment includes the movable member 41 , the transmission assembly 43 , the wire-bending element 44 and the return passage 45 .
  • the return passage 45 communicates with the intake passage 123 and the second wire-bending gas flowing space 142 of the wire-bending control chamber 14 , so that the intake passage 123 is communicable with the second wire-bending gas flowing space 142 via the return passage 45 .
  • FIG. 12A In practical application of the pneumatic stapler according to the second preferred embodiment, when the trigger 121 is in a released state, gas is supplied from the pressure source to the intake chamber 122 , the intake passage 123 and the return passage 45 at the same time. The supplied gas flowing into the intake passage 123 will push the shielding member 182 away from the fixing member 181 to shield the upper end of the cylindrical staple-driving control wall 16 , so that no gap is formed between the shielding member 182 and the cylindrical staple-driving control wall 16 and no gas can flow into the staple-driving control chamber 17 .
  • the supplied gas flowing into the return passage 45 finally flows into the second wire-bending gas flowing space 142 in the wire-bending control chamber 14 to upward push against the movable member 41 , so that the movable member 41 is located at a highest position in the second wire-bending gas flowing space 142 and the wire-bending element 44 is located at the ready-for-bending position P 3 .
  • the supplied gas can flow only into the intake chamber 122 but not the intake passage 123 and the return passage 45 . Thereafter, the supplied gas is divided into two parts, one of which is staple-driving gas for pushing against the staple-driving element carrier 31 , and the other part is wire-bending gas for pushing against the movable member 41 .
  • the staple-driving element carrier 31 can carry the staple-driving element 32 to the staple-driving position P 2
  • the movable member 41 can move the wire-bending element 44 via the transmission assembly 43 to the wire-bending position P 4 .
  • the supplied gas can also flow into the intake passage 123 .
  • the supplied gas in the intake passage 123 can flow into the second wire-bending gas flowing space 142 via the return passage 45 to upward push against the movable member 41 , so that the movable member 41 brings the wire-bending element 44 away from the wire-bending position P 4 .
  • the supplied gas could not flow into the staple-driving control chamber 17 and the openings 181 c are not shielded by the shielding column 182 a .
  • the staple-driving gas in the staple-driving control chamber 17 and the wire-bending gas in the wire-bending control chamber 14 can only flow through the openings 181 c on the fixing member 181 into the environment outside the main body 10 .
US16/044,471 2017-09-07 2018-07-24 Pneumatic stapler Abandoned US20190070718A1 (en)

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TW106130696A TWI623393B (zh) 2017-09-07 2017-09-07 氣動釘針打擊裝置
TW106130696 2017-09-07

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JP3489304B2 (ja) * 1995-12-11 2004-01-19 マックス株式会社 電動ホッチキス
SE525369C2 (sv) * 2001-09-14 2005-02-08 Isaberg Rapid Ab Klammerformare i en häftapparat
US6923360B2 (en) * 2002-07-31 2005-08-02 Hewlett-Packard Development Company, L.P. Adjustable stapler and methods associated therewith
TWM363976U (en) * 2009-04-30 2009-09-01 Mainpack Ind Co Ltd Clamp device of pneumatic C shaped nail gun
SE534656C2 (sv) * 2010-02-11 2011-11-08 Isaberg Rapid Ab Bockstansarrangemang

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